The junction boxes are used in a star-shaped installation. Thanks to the pouring out with Blue Gel, these are also IP68 waterproof and can be dismantled again if necessary and sealed with new gel. 
The parallel version can be used for 12V 24V DC installation as well as for 230VAC distribution. 
 
This set is for serial connections and includes:
1 junction box ABBox 80 7-fold with plastic membrane
4 WAGO box terminals 5-fold for 0.75-4mm2 cable
1 pack Blue Gel 240ml